0.0

2018

6.3

2016

0.0

2005

8.0

2013

7.5

1972

8.1

2004

8.8

1999

5.9

1993

7.8

2008

7.2

1996

5.6

2001

7.7

1994

6.5

1994

9.2

2011

8.5

2011

7.6

2010

8.1

2007

7.7

2011

8.1

2012

6.8